The drug metronidazole also called Flaggy is an antibiotic which is effective against anaerobic bacteria and some certain parasitesThis drug is an antibiotic that helps in the treatment of infections it works by inhibiting the growth of bacteria and parasites This drug has its effect in the treatment of bacterial and parasitic functionsMetronidazole can also be combined with other drug to treat infections like stomach intestinal ulcer that is caused by helicobacter pylori H.pylori.